French: from the Latin name Claudius. It was borne by various early saints, but its popularity in France is largely due to the fame of the 7th-century St Claude of Besançon. This form is widely used in the English-speaking world and has superseded Claud as the preferred spelling in Britain and the United States.
Portuguese, Galician, and Jewish (Sephardic): topographic name from Portuguese pereira ‘pear tree’, or a habitational name from a place named with this word in Portugal and Galicia. The surname is also common in western India, having been taken there by Portuguese colonists.